User Tools

Site Tools



This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
documentation:next_cdm:days_supply [2016/02/25 12:04]
documentation:next_cdm:days_supply [2017/07/06 19:18] (current)
Line 1: Line 1:
-===== Remove days_supply field =====+===== End of a drug exposure ​===== 
 +=== Proposals are now tracked as github issues === 
 +[[https://​​OHDSI/​CommonDataModel/​issues/​71|link to issue in github]]
   * Requester: Klaus Bonadt, Christian Reich, Patrick Ryan   * Requester: Klaus Bonadt, Christian Reich, Patrick Ryan
Line 6: Line 8:
 ---- ----
 ==== Proposal ==== ==== Proposal ====
-If the days_supply and the drug_exposure_end_date fields essentially designate the same thing they are therefore duplicates of the same information and create the danger of of inconsistencyOne of them could be dropped +Relevant table:​web/​wiki/​doku.php?​id=documentation:​cdm:drug_exposure
- +
-Alternatively,​ we could split them into two different meanings:+
 ^Field^Required^Type^Description^ ^Field^Required^Type^Description^
-|drug_exposure_end_date|No|date|The end date for the current instance of Drug utilization. ​It is not available from all sources.| +|drug_exposure_end_date|Yes|date|The end date for the current instance of Drug utilization. ​Depending on different ​sources, it could be a known or an inferred date and denotes the last day at which the patient was still exposed to drug.| 
-|days_supply|No|integer|The number of days of supply of the medication as recorded in the original prescription or dispensing record.|+|days_supply|No|integer|The number of days of supply of the medication as prescribed. This reflects ​the intention of the provider for the length of exposure.| 
 +|verbatim_end_date|No|date|The known end date of a drug exposure as provided by the source.| 
 +The verbatim_end_dat field is only necessary as the drug_exposure_end_date becomes mandatory, and might be (wrongly) inferred. In cases where no good data are available to fill that end_date, the ETL will have to take a guess, and that may not satisfy some algorithms for dose calculation.  
 +== Conventions == 
 +  * The drug_exposure_end_date denotes the day the drug exposure ended for the patient. This could be that the duration of drug_supply was reached (in which case drug_exposure_end_date = drug_exposure_start_date + days_supply -1), or because the exposure was stopped (medication changed, medication discontinued,​ etc.)
documentation/next_cdm/days_supply.1456401840.txt.gz · Last modified: 2016/02/25 12:04 by cgreich